Just an allergic reaction that is continuing
Find out if you have changed anything in the last 2 weeks, new bed sheets, new clothes, new materials, animals/pets and any new foods.
Also during the monsoon, when it's always raining, children do get a cold
Next Steps
if there is anything new, avoid that
if it doesn't settle, better to buy an air purifier to remove the allergens in the air
saline nasal drops - 1 -2 drop in each nose, every 2 hours can help
Health Tips
in case of fever, breathing difficulty, increase work of breathing, breathlessness - needs prompt medical attention